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pump. There is a 200ft difference in elevation between the two water surfaces. The inlet pi the reservoir is projected inwardly into the tank, and is 8ft below the surface. Local cond are such that the level is substantially constant. The storage tank is vented to the atmos and the liquid level is maintained constat. The inlet pipe to the storage tank is 6.0ft belo surface. The piping system consists of 200ft of 6 -in Sch.40 steel pipe containing two 90 -c elbows and one open gate valve from the reservoir to the pump; the 6 -in pipe follows the for a length of 75ft after which the pipe size is reduced to 4 -in Sch. 40 steel pipe, 250 ft and with three 90 -degree elbows. It is desired to maintain a flow of water into the tank o GPM. Water temperature is 68°F. If the pump-motor set-up has an overall efficiency of what would be the pumping costs if the electricity costs Php 15.00/kWh ? 6 ft 200 ft 250 ft 4-in Sch. 40 8 ft 200 ft 6-in Sch. 40 75 ft 6-in Sch, 40

pump. There is a 200ft difference in elevation between the two water surfaces. The inlet pi the reservoir is projected inwardly into the tank, and is 8ft below the surface. Local cond are such that the level is substantially constant. The storage tank is vented to the atmos and the liquid level is maintained constat. The inlet pipe to the storage tank is 6.0ft belo surface. The piping system consists of 200ft of 6 -in Sch.40 steel pipe containing two 90 -c elbows and one open gate valve from the reservoir to the pump; the 6 -in pipe follows the for a length of 75ft after which the pipe size is reduced to 4 -in Sch. 40 steel pipe, 250 ft and with three 90 -degree elbows. It is desired to maintain a flow of water into the tank o GPM. Water temperature is 68°F. If the pump-motor set-up has an overall efficiency of what would be the pumping costs if the electricity costs Php 15.00/kWh ? 6 ft 200 ft 250 ft 4-in Sch. 40 8 ft 200 ft 6-in Sch. 40 75 ft 6-in Sch, 40

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Water is pumped from a reservoir to a storage tank atop a building by means of a centrifugal pump. There is a 200ft difference in elevation between the two water surfaces. The inlet pipe at the reservoir is projected inwardly into the tank, and is 8ft below the surface. Local conditions are such that the level is substantially constant. The storage tank is vented to the atmosphere and the liquid level is maintained constant. The inlet pipe to the storage tank is 6.0ft below the surface. The piping system consists of 200ft of 6 -in Sch.40 steel pipe containing two 90 -degree elbows and one open gate valve from the reservoir to the pump; the 6 -in pipe follows the pump for a length of 75ft after which the pipe size is reduced to 4 -in Sch. 40 steel pipe, 250 ft long and with three 90 -degree elbows. It is desired to maintain a flow of water into the tank of 625 GPM. Water temperature is 68°F. If the pump-motor set-up has an overall efficiency of 55%, what would be the pumping costs if the electricity costs Php 15.00/kWh ? 6 ft 200 ft 250 ft 4-in Sch. 40 8 ft 200 ft 6-in Sch. 40 75 ft 6-in Sch. 40
Transcribed Image Text:Water is pumped from a reservoir to a storage tank atop a building by means of a centrifugal pump. There is a 200ft difference in elevation between the two water surfaces. The inlet pipe at the reservoir is projected inwardly into the tank, and is 8ft below the surface. Local conditions are such that the level is substantially constant. The storage tank is vented to the atmosphere and the liquid level is maintained constant. The inlet pipe to the storage tank is 6.0ft below the surface. The piping system consists of 200ft of 6 -in Sch.40 steel pipe containing two 90 -degree elbows and one open gate valve from the reservoir to the pump; the 6 -in pipe follows the pump for a length of 75ft after which the pipe size is reduced to 4 -in Sch. 40 steel pipe, 250 ft long and with three 90 -degree elbows. It is desired to maintain a flow of water into the tank of 625 GPM. Water temperature is 68°F. If the pump-motor set-up has an overall efficiency of 55%, what would be the pumping costs if the electricity costs Php 15.00/kWh ? 6 ft 200 ft 250 ft 4-in Sch. 40 8 ft 200 ft 6-in Sch. 40 75 ft 6-in Sch. 40
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